Straightedge device



Patented dan. 9, lc

fifi

:simian nunnnsnonr,

Oli? CHICAGO, LLNOIS.

STRAIG'IEITEDGE DE'VECE.

Application led March 25, 1920. Serial No. 368,652.

To all whom "it may concern Be it known that l, LILLIAN Runnirsnonr, acitizen of the United States, residing at Chicago, in the county of Cookand State of l'llinois, have invented a new and useful linprovement inFntraightedge Devices, ot which the following; is a speciiieation.

This invention relates particularly to a device in the nature ot astraight edge adapted Jfor photograph retow/'hingr` artists7 pos-terwork, etc.

The primary object oi the invention is to provide an improved devicewell adapted to the purpose indicated.

The invention is illustrated in its preterred embodiment in theaccompanying dra-wing, in which- Figure l represents a plan view of theiniproved device; Fig. 2, an elevational view of the saine; Fig. 3, asectional view taken as indicated at line 3-3 ot Fig. l; and Fig. ll, aperspective view oit one ot the adjustable bearing blocks employed.

ln the construction illustrated, A represents a straight edge strip; andB, B, bearings; blocks which are `adjustable longitudin ally withrelation to the strip il.

in the illustration given, the straight edge strip A is provided withstraight edges 1 and 2, the latter being` undercut. i

rEhe inernber A is provided centrally with a longitudinal slot 3, whichis reduced at its lower portion, as indicated at 3. rlhe slot extendstroni near one end ot the member A to near the other end tnereo'l".`Each oi' the bea ring! blocks ld and lli may, in'eiieral'ily, be o 'I'he forni illustrated in Thus, each hlocl; is provided. on its upper sidewith a central elongated lenen, or spline. 4:, which works in thereduced portion la ciA the slot as a guido. The blo-ehe are adj ustablysecured by means of screws 5 equipped with washers 5a. rlhe washers 5ahear upon the shoulder afforded by the bottoni ot the wide portion oitthe slot, and the screws extend through the slot and into the blocks andserve to clamp the blocks to the strip il.. The guidetenons 1lare lowenough so that they will project slightly less than 'flush with theloottom of the wide portion of the slot. rllhus, the blocks can besecurely clamped to the strip A at any desired point.

ln the use or the improved device :tor the purpose ot retouching'photographs, 'For eas ample, the blocks are adjusted to bear upon thecard, or mounting, of the photograph at opposite sides of the photographproper; and the retouching can be done upon the photograph loy rneans ota pen, the strip being' used as a straight edge. rEhe improved device isadapted to be adjusted to the wort of retouchinp,- photographs ot'varying width. The blocks may be caused to bear upon the card in suchinanner as to cause it to lie flat while the work oli' retouching isperformed, This is or especial advantage in work of retouchingphotographs, which have a tenl de'ncy to curl up or warp. Thedevice may be employed, also, for artists poster work and similar work.

The forni illustrated affords a cheap and satisfactory construction for`inost purposes. y rlhe strip A. and the blocks B may be coinposed ofwood. Any suitable adjustable connection between the blocks and thestrip may be employed. vThe blocks are short enough in a directiontransversely of the strip A to enable the edge portion of the strip toproject over the 1clocks. Ordinarily, the strip A will have straightedges, as shown.

ililhat l regard as new, and desire to secure by Letters latent, is:

l. A device of the character set forth, confiprisin ,f a strip adaptedfor ruling purposes, and bearing blocks disposed wholly on one side ofsaid strip and adjustably connected therewith. for adjustmentlongitudinally olf the strip, said blocks being adapt ed to rest upon acard which is to be ruled.

2. il. device ot the character set forth, comprising; a "o provided witha straight e adapted foi. iling purposes, said strip provided with alongitudinal islot, bearing blocks disposed on one side of said stripand slidably connected with said slot, and nieans for clampinglysecuringsaid hearing blocks to said strip.

A. device of the character set forth, coinprisinp; a strip provided witha stra-ight edge adapted for ruling purposes, said strip being;`provided with a longitudinal slot, bearing bloclrs disposed on one sideot said strip and slidably connected with said slot, said blocks beingwholly covered by said strip, and means rior clainpingly securing `saidhearing` blocks to said stri LILLAN 'RilDElRSDORE

